SQL不同的問題

Question

我有一個SQL表的格式如下：

Screenname|realname|followers|tweet 
bob  |jim  |5  |hi 
bob  |jim  |20  |hello 
tom  |joe  |15  |JOETHECAT 
tim  |joe  |16  |TEST 

我需要編寫他們的真實姓名和追隨者沿着TOTALNUMBER顯示每個獨特的屏幕名的查詢。

Screename realname followers 
bob  jim  25 
tom  joe  15 
tim  joe  16 

Answer 1

使用GROUP BY by Screename，realname和SUM followers。

select Screename, realname, sum(followers) as followers 
from your_table 
group by Screename, realname 

Answer 2

試試這個：

Select screenname, realname, sum(followers) as followers 
from twitter_users 
group by screenname, realname 

Answer 3

它利用集團的簡單通過

select Screename, realname, sum(followers) as followers 
from your_table 
group by Screename, realname